The Cistern of Theodosius, or Şerefiye Sarnıcı, is a Byzantine water reservoir in Istanbul’s Binbirdirek neighbourhood. Built under Emperor Theodosius II between 428 and 443, it stored water brought by the Valens Aqueduct. Inside, 32 marble columns, about nine metres high, support a vaulted roof above a shallow pool. The cistern is smaller than the Basilica Cistern, so it makes a shorter, quieter stop to study the columns, arches and changing reflections. Contemporary art displays and cultural events are also held at the site.
A water reservoir beneath Istanbul
Known in Turkish as Şerefiye Sarnıcı, the Cistern of Theodosius was built between 428 and 443, during the reign of Emperor Theodosius II. Its purpose was to store water for Constantinople. The Valens Aqueduct supplied the cistern as part of the city’s water system.
The covered reservoir measures about 45 by 25 metres. Above it, the city continued to develop: the Arif Pasha Mansion was built over the cistern in 1910, and the former Eminönü municipal building followed in the 1950s.
Columns, arches and displays
Thirty-two marble columns, each about nine metres high, hold up the cistern’s roof. Arches and vaults connect the columns and carry the weight of the street above. Different types of marble and carved capitals add detail to the structure.
The cistern has been restored and opened to the public as a museum and cultural venue. Contemporary art displays and cultural events have been held inside and around the complex. The light and sound show described in some older accounts is no longer running, so check what is currently on display before you go.
Planning a short visit
The cistern is smaller than Istanbul’s Basilica Cistern, and a visit can be brief. Its underground setting is cool and dimly lit, with shallow water beneath the columns. Take time to look at the capitals and the way the lighting falls across the arches and pool.
Online tickets are recommended to help avoid a long wait. If you have a ticket intended for queue-jump entry, check the signs and join the matching line; ask at the entrance if the route is unclear. Headphones can be useful if you prefer to follow an audio guide.
FAQ
Where is the Cistern of Theodosius?
It is in the Binbirdirek neighbourhood of Fatih, Istanbul, at Piyer Loti Caddesi No. 2/1.
When was the cistern built?
It was built between 428 and 443, during the reign of Emperor Theodosius II.
How long does a visit take?
It is a compact site, and a visit can take about 10 minutes.
Is there a light and sound show?
The light and sound show mentioned in some older accounts is no longer running. Contemporary art displays and cultural events have been held at the complex.
